CN105692731A - Method for treating wastewater with conductive filter material and achieving regeneration - Google Patents
Method for treating wastewater with conductive filter material and achieving regeneration Download PDFInfo
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- CN105692731A CN105692731A CN201610149092.9A CN201610149092A CN105692731A CN 105692731 A CN105692731 A CN 105692731A CN 201610149092 A CN201610149092 A CN 201610149092A CN 105692731 A CN105692731 A CN 105692731A
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- electrolysis
- waste water
- filter tube
- filtering material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/48—Devices for applying magnetic or electric fields
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides a method for treating wastewater with a conductive filter material and achieving regeneration. The conductive filter material is made into a pipe shape suitable for pressure filtering, namely, a filter pipe, and the filter pipe is connected with the negative electrode of an electrolytic power supply; an inert electrode is arranged in the center of the filter pipe and connected with the positive electrode of the electrolytic power supply; one end of the filter pipe is provided with a water inlet pipe for pumping in wastewater to be treated, and the other end of the filter pipe is provided with a water outlet pipe. In the filtering process, the electrolytic power supply carries out power supply and electrolysis at the same time, or when the water outlet amount is obviously decreased after filtering is carried out for a period of time, electrolysis is started to recover the filtering performance of the filter pipe. In the electrolysis process, hydrogen bubbles are constantly generated in pore channels of the filter material serving as a negative electrode and generate huge bubble pressure in the growing process, so that particles filling the pore channels of the filter material are rapidly separated from a biological membrane, and the filtering performance of the filter material is rapidly recovered. The method solves the problems that a conventional filter material is difficult to regenerate, short in service life and the like.
Description
Technical field
The invention belongs to field of environmental technology, be specifically related to a kind of employing electric conductivity filtering material and process waste water and regeneration method。
Background technology
Filtration is the isolation technics of a kind of simple efficiently non-secondary pollution, and in decades, filtering technique is widely used in the purification technique containing stain disease。In water body, solid particle, colloid, Organic substance, harmful ion and antibacterial etc. are effectively removed such as through filtering technique。At present, widely used filtering material has numerous species, including the sandstone of granular texture, Ore, anthracite, shell and material with carbon element etc., and the porous polymeric Organic substance film of block structure, porous ceramics, porous metals and scrim etc.。Waste particles, with the form of granule or film, being retained by effects such as obstruct, adsorption bridgings, allowing hydrone pass through, thus reaching the target of scrubbing water by these filtering materials。Oarse-grained solid suspension, jelly, larger oil droplet etc. not only can be blocked in the surface (microfiltration, ultrafiltration) of filtering material by high-quality filtering material, it is also possible to absorb in filtering material hole (nanofiltration, reverse osmosis etc.) passing through the little granule of filter opening, small organic molecule, inorganic particulate, antibacterial etc.。Meet efficient separation process, in addition it is also necessary to have rational filtering material regeneration。After completing a filter cycle, blocking in the coverage hole of filtering material surface, the flux of clean-up effect and water all greatly declines, and now, filtering material could utilize after needing regeneration again。At present, general purification technique adopts backwash process, and scouring media can be clean water or gas。Backwash process can wash away the partial particulate in filtering material duct and absorb refuse in unstable hole, but is difficult to develop the waste particles of firm attachment in hole。It is because while that backwash process rate of flow of fluid is fast, but the complicated duct of filtering material makes the rate of flow of fluid in hole be difficult to improve, it is difficult to thoroughly firm attachment thing in scour hole。In order to solve the halfway problem of backwash, domestic and international project technical staff proposes the back-flushing method of improvement, assists including sonic oscillation, adds abluent, accelerates to rinse speed etc., but all there is certain application problem。Sonic oscillation needs large-area ultrasonic device, adds abluent and improves backwash cost and bring secondary pollution, and accelerates to rinse speed and make the backwash water yield increase, and not only cost increases, and effect often fails to reach expection。
Summary of the invention
For overcoming prior art not enough, the present invention provides a kind of and adopts electric conductivity filtering material to process waste water and regeneration method, and the method reproduction speed is fast, regeneration fully, and easy to operate, the suitability is strong。
For achieving the above object, this invention takes techniques below scheme:
A kind of method adopting electric conductivity filtering material to process waste water, electric conductivity filtering material is made the tubulose of applicable pressure filtration, i.e. filter tube, it is connected with electrolysis power negative pole, inert electrode being placed in the center of filter tube, is connected with the positive pole of electrolysis power, there is oral siphon one end of filter tube, for pumping into pending waste water, the other end has outlet pipe；During filtration, electrolysis power is powered electrolysis or filtration a period of time simultaneously, after water yield is decreased obviously, starts electrolysis, recovers the strainability of filter tube。
The filtration that the inventive method is typically used in waste water micron particles and oil droplet, colloid etc.。The hydrogen gas bubbles that in electrolytic process, electric conductivity filtering material produces produces huge tension force in release process, and makes the inside, hole of filter tube produce local alkalescence, so that the granule being packed in filtering material internal disengaging from duct, it is achieved the regeneration of filter material strainability。Filtering material can remain powered on operation, it is possible to intermitten service。Intermitten service refers to, after not charged operation certain time, significant decline (owing to molecule blocks filtration channel) occurs in effluent flux, now can stop filtering, start electrolysis, the strainability of restorer。Relatively low at useless electrical conductivity of water, or electrolysis power consumption is higher, it is contemplated that in waste water, inject the electrolytical saline of sodium chloride-containing。
The tube wall of described filter tube is porous, and aperture is 0.1-1 micron。
Described filter tube can be made up of conducting ceramic material, and including tungsten carbide, titanium diboride, titanium nitride etc., these three kinds of materials have good chemical stability and machinability。If filtering material is the block materials that above-mentioned a certain conductivity ceramics (tungsten carbide, titanium diboride, titanium nitride) forms, thickness is generally 2 ~ 10mm。
Described filter tube can also be made by being coated with on non-conductive base material conductivity ceramics, and ceramic layer is generally 0.1-2mm thickness。
Described inert electrode can be the anode material of the stable chemical natures such as ruthenium titanium dimensional stable anode, titanium platinum plated anode or diamond anode。The central authorities that position is electroactive chimney filter placed。The voltage range of described electrolysis is 1-10V。
The present invention also provides for the renovation process of a kind of electric conductivity filtering material, is connected with electrolysis power negative pole by electric conductivity filtering material, is connected with the positive pole of electrolysis power by inert electrode, carries out electrolysis。
Described electric conductivity filtering material can be made up of conducting ceramic material, including tungsten carbide, titanium diboride, titanium nitride etc.。
Described electric conductivity filtering material can also be made by being coated with on non-conductive base material conductivity ceramics, and ceramic layer is generally 0.1-2mm thickness。
Compared with traditional Woelm Alumina filtering material (non-conductive), present invention employs the ceramic material of conduction as filtering material, be the regeneration that realizes filtering material of the principle by electrochemical electrolysis。Control the generation amount of bubble by regulating voltage, electrolyte solubility etc., and regulate electrolysis time, make the filtering material of different conditions all can realize high-efficient purification regeneration。Compared with existing backwash method regeneration, the advantage of the inventive method and having the beneficial effects that:
1) bubble that electrolytic process is formed produces huge active force in the process departed from, it is possible to make the duct no particulate matter of firm attachment obtain sharp separation。Meanwhile, the local alkalescence that electrolysis produces, also have and duct is had certain cleaning action。
2) time is short, speed is fast, elution efficiency is high in process, more energy-conservation than traditional waterpower cleaning way。
3) conveniently regulate generation quantity and the speed of bubble by controlling decomposition voltage, time and electrolyte solubility, targetedly different filtrates are carried out efficient eluting, it is easy to Automated condtrol。
4) processing procedure only produces oxygen, hydrogen and a small amount of hypochlorous acid, will not secondary pollution。
Accompanying drawing explanation
Fig. 1 is the device schematic diagram that the present invention processes method for waste water。1-filter tube, 2-clear water tanks, 3-inert electrode, 4-oral siphon, 5-outlet pipe, 6-support。
Detailed description of the invention
Below by way of specific embodiment, technical solution of the present invention is described, but protection scope of the present invention is not limited to this example。
Embodiment 1
Adopt conductivity silicon carbide tungsten filtering material, for the filtration treatment of muddy surface water。As it is shown in figure 1, experimental provision includes filter tube 1, length is 30cm, and interior diameter is 4cm, and thickness is 2cm。Filter tube is the porous ceramic filter pipe (average pore size is 0.1-1 micron) that tungsten carbide makes, and earthenware is drawn by metal molybdenum filament and is connected with the negative electrode of DC source。Also having a ruthenium titanium carefully rod anode in the middle of filter tube, long is 30cm, as the anode of electrolytic process during work, draws connected mode identical with negative electrode。Having oral siphon 4 and outlet pipe on filter tube, remainder seals, and during work, pump-in pressure is 0.2-0.4MPa。Filter tube is placed in clear water tanks 2, during work, enters in clear water tanks 2 by the clean water seepage flow of filter tube, and the clean water of gained by follow-up reuse, and can pump water and can be back to muddy water tank (not shown in FIG.)。Filter tube is fixed in clear water tanks 2 by support 6。
For verifying the effect of the present invention, taking the Changjiang river muddy water containing particle, the solid suspension solubility of muddy water is at 200ppm, and grain diameter is 2-10 micron, and Organic substance is the extra humic acid (30mg/L) added, and controls total CODcrSolubility be 200mg/L。Filtrate pH value is adjusted to close to neutral 6.5, and it is uniform that water tank is slowly stirred guarantee influent quality。From water tank, pump into water (high precision diaphragm pump) enter the filter tube 1 of diagram, pump water and return still to water tank。Preparing the two identical defecators of set and carry out contrast test, filter tube material used is with batch preparation, is absent from the significant difference of storeroom。Experimental group one is not added with electric field, and experimental group two, plus electric field, implements electrolysis while filtering。After filtration starts, control pump-in pressure is 0.2MPa, and cycle of operation is 2d, and the voltage of electrolysis group is 5V。
Record the water level in clear water tanks and calculate the water yield in a certain unit interval。Result is as follows:
From the result of upper table, it can be seen that do not adopt the mode of electrolysis, within 48 hours, postrun water flux conservation rate is only 37%, and mainly in water body, void channels are blocked by particulate matter, and water penetration is deteriorated；And when electrolysis, granule in the duct of filtering material cannot form stable attachment, being capable of the persistence filtered, after within 48 hours, running, water flux conservation rate (namely the permeation flux excessively after 2 days is divided by fresh Filter column water flux) has still reached more than 97%。
Embodiment 2
Adopt electroactive tungsten carbide filtering material, for the process of oil-containing food and drink waste water。The experimental provision of embodiment 2 is all identical with embodiment 1 with material fabrication process and experimental technique, and the experimental result obtained is as shown in the table。After oil-containing food and drink waste water takes from the oil interceptor of certain food and drink waste water treatment facility, measuring after organic solvent extraction containing oil quantity is 0.45g/L, and filtration experiment cycle of operation is 72 hours。Record the water level in clear water tanks and calculate the water yield in a certain unit interval。Result is as follows:
Can be seen that, water flux conservation rate behind 72 hours of electrolytic experiment group is apparently higher than the not non-electrical system of solutions, describe electrolysis to be able to maintain that the disposal ability containing oils and fats food and drink waste water, the water flux conservation rate of filtration system can be kept again, embody invention advantage in the treatment of waste water。
Embodiment 3
Adopt titanium nitride filtering material, for the filtration treatment of muddy surface water。Experimental provision is with example 1, but the filter tube material adopted is titanium nitride filtering material, electrically connects as the surface of contact titanium nitride layer。This filtering material is on the basis of common alumina tube, deposits the one layer of electroactive cover layer of porous titanium nitride (inside pipe wall), and layer thickness is 0.7mm, and the average pore size of active layer is 0.7 micron。Experimental group one is not added with electric field, and experimental group two, plus electric field, implements electrolysis while filtering。After filtration starts, control pump-in pressure is 0.2MPa, and cycle of operation is 3d, and the voltage of electrolysis group is 5V, processes surface water quality parameter with example 1。
Record the water level in clear water tanks and calculate the water yield in a certain unit interval, and carrying out water analysis。By analyze find, after the operation of continuous three days, two groups experiment clean cisterns in water quality and zero difference, total suspended particles content is respectively less than 5ppm。And the analysis result of water flux is as follows:
From the results, it was seen that as the electroactive cover layer of titanium nitride as electroactive material, it is also possible to playing the purpose of filtration treatment and electrochemical regeneration, water treatment efficiency is good, embodies the advantage of electrochemical regeneration method of the present invention。
Claims (9)
1. one kind adopts the method that electric conductivity filtering material processes waste water, it is characterised in that:
Electric conductivity filtering material is made the tubulose of applicable pressure filtration, i.e. filter tube, be connected with electrolysis power negative pole, inert electrode being placed in the center of filter tube, is connected with the positive pole of electrolysis power, there is oral siphon one end of filter tube, for pumping into pending waste water, the other end has outlet pipe；During filtration, electrolysis power is powered electrolysis or filtration a period of time simultaneously, after water yield is decreased obviously, starts electrolysis, recovers the strainability of filter tube。
2. the method for process waste water according to claim 1, it is characterised in that: the tube wall of described filter tube is porous, and aperture is 0.1-1 micron。
3. the method for process waste water according to claim 1, it is characterised in that: described filter tube thickness is 2～10mm。
4. the method for process waste water according to claim 1, it is characterised in that: described filter tube is the block materials that conducting ceramic material independently forms, or coating ceramic layer is made on non-conductive porous base material。
5. the method for process waste water according to claim 4, it is characterised in that: described conductivity ceramics includes tungsten carbide, titanium diboride or titanium nitride。
6. the method for process waste water according to claim 4, it is characterised in that: coating ceramic layer is that 0.1-2mm is thick。
7. the method for process waste water according to claim 1, it is characterised in that: the voltage range of described electrolysis is 1-10V。
8. the renovation process of an electric conductivity filtering material, it is characterised in that be connected with electrolysis power negative pole by electric conductivity filtering material, is connected inert electrode with the positive pole of electrolysis power, carries out electrolysis。
9. the renovation process of electric conductivity filtering material according to claim 8, it is characterised in that described electric conductivity filtering material is made up of conducting ceramic material, or made by non-conductive base material is coated with conductivity ceramics。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610149092.9A CN105692731B (en) | 2016-03-16 | 2016-03-16 | It is a kind of that waste water and regeneration method are handled using electric conductivity filtering material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610149092.9A CN105692731B (en) | 2016-03-16 | 2016-03-16 | It is a kind of that waste water and regeneration method are handled using electric conductivity filtering material |
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| CN105692731A true CN105692731A (en) | 2016-06-22 |
| CN105692731B CN105692731B (en) | 2019-03-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106966555A (en) * | 2017-05-19 | 2017-07-21 | 武汉大学 | Biomembrane and water process integration apparatus and water treatment technology associated with electric filter |
| CN107737350A (en) * | 2017-09-25 | 2018-02-27 | 天津工业大学 | The sterilizing unit of carbon nanotubes milipore filter and its preparation method of milipore filter |
| CN114314879A (en) * | 2021-12-14 | 2022-04-12 | 湖北工业大学 | Floated water stage filter equipment |
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| GB1362704A (en) * | 1967-09-18 | 1974-08-07 | Roy C H | Electrolytic purification process and apparatus |
| DE10319044A1 (en) * | 2003-04-25 | 2004-11-11 | Bergische Universität Wuppertal | Device for the electrolytic and oxidative treatment of waste water, filtration membranes used here, their production and methods for treating waste water by means of this system and / or these filtration membranes |
| CN202968214U (en) * | 2012-12-15 | 2013-06-05 | 安徽宇事科技有限公司 | Electrolytic water tank |
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2016
- 2016-03-16 CN CN201610149092.9A patent/CN105692731B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1362704A (en) * | 1967-09-18 | 1974-08-07 | Roy C H | Electrolytic purification process and apparatus |
| DE10319044A1 (en) * | 2003-04-25 | 2004-11-11 | Bergische Universität Wuppertal | Device for the electrolytic and oxidative treatment of waste water, filtration membranes used here, their production and methods for treating waste water by means of this system and / or these filtration membranes |
| CN202968214U (en) * | 2012-12-15 | 2013-06-05 | 安徽宇事科技有限公司 | Electrolytic water tank |
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| 唐林生等: "《绿色精细化工概论》", 30 June 2008 * |
| 戴遐明: "《超微陶瓷粉体实用化处理技术》", 30 September 2009 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106966555A (en) * | 2017-05-19 | 2017-07-21 | 武汉大学 | Biomembrane and water process integration apparatus and water treatment technology associated with electric filter |
| CN106966555B (en) * | 2017-05-19 | 2020-04-10 | 武汉大学 | Water treatment integrated equipment combining biological membrane and electric filtration and water treatment process |
| CN107737350A (en) * | 2017-09-25 | 2018-02-27 | 天津工业大学 | The sterilizing unit of carbon nanotubes milipore filter and its preparation method of milipore filter |
| CN114314879A (en) * | 2021-12-14 | 2022-04-12 | 湖北工业大学 | Floated water stage filter equipment |
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| CN105692731B (en) | 2019-03-15 |
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